<section>
  <h4>Operable Tree</h4>
  <d-operable-tree
          #operableTree1
          [tree]="data3"
          [treeNodeIdKey]="'id'"
          [treeNodeChildrenKey]="'children'"
          [checkboxDisabledKey]="'disabled'"
          [checkboxInput]="checkboxInput"
          (nodeDeleted)="onOperableNodeDeleted($event)"
          (nodeSelected)="onOperableNodeSelected($event)"
          (nodeToggled)="onOperableNodeToggled($event)"
          (nodeChecked)="onOperableNodeChecked($event)"
  >
  </d-operable-tree>
  <pre>All Checked Notes:{{ checkNote | json }}</pre>
</section>
